<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script >
		var str="数据类型"	
		console.log(str);
		
		var i = 100;
		console.log(i);
		
		var isman = true;
		console.log(isman);
		
		var hobby =["a","b","c","d"]
			console.log(hobby);
		console.log(hobby[0]);	
	console.log(hobby[hobby.length-1]);	
		
		
		
		</script>
		
	</head>
	<body>
	</body>
</html>
